Draft and buffing rigging.



No. 693,596. Patented Feb. l8, I902.

n. n. GALLAGHER, m. DRAFT AND BUFFING mama.

Agplica-tion filed Dec. 5, 1901.) (No Model.)

UNTTnn STATES ATENT OFFICE.

RICHARD D. GALLAGHER, JR., OF NEW YORK, N. Y., ASSIGNOR TO STANDARDCOUPLER COMPANY, OF NElV YORK, N. Y., A CORPORATION OF NEW JERSEY. I

DRAFT AND BUFFING RIGGING.

SPECIFICATION formingpart of Letters Patent No. 693,596, dated. February18, 1902.

Original application filed August 26, 1901, Serial No. 73,287. Dividedand this application filed December 5, 1901. Serial No. 84,803. (Nomodel.)

To all whom it may concern: 1, suitable stops, shoulders, or'the likebeing Be it known that I,RIOHARDD.GALLAGHER, provided thereon at 2 andbetween which the J12, of New York, in the county and State of riggingis mounted, as usual. The numeral 3 o NewYork,have inventedcertainnewanduseindicates the draw-bar, and 4 the strap at- 5 ful Improvementsin Draft and Buffing Rigtached thereto, these two parts constitutingging; and I do hereby declare the following to what I term the pressure-transmitting membe a full, clear, and exact description of theber,and itis obvious that the particular consame, reference being had tothe accompanystruction of the same is immaterial, just so it ingdrawing, forming a part of this specificabe capable of transmitting thedraft and buff- IO tion, and to the figures of reference marked ingstrains to the rigging proper.

thereon. Follower-plates 5 5, adapted to seat against v The presentapplication is a division of my the stops 2, are employed, and betweenthese prior application, Serial No. 73,287, filed Aufollower-plates aspring or yielding resistance o0 gust 26, 1901, the device illustratedin the member and friction elements are arranged 15 present case beingone of the species illusas follows: The spring 6 (or, if desired, twotrated in said prior application; and the insprings arranged tandem,with a spring-plate vention consisting, broadly stated, in the em- 7between them) bears at one end against one ployment of friction elementsat one end only of the follower-plates and at the opposite end of thespring, said friction elements being so against a follower 8,havinginclined friction- 20 combined as to effectagreater range ofmovefaces 9 thereon, as shown. Surrounding the ment in the compressionof the spring than follower 9 is the head 10 of a casing 11, said therange of movement of the draw-bar or head havinginclines 12, forming,with the inpressure-transmittingmemberitself,and with clines 9 andfollower 5, angular chambers, in a casing or secondarypressure-transmitting which wedge-blocks 13 are located.

'25 member extending from said friction ele- The casing audits head inthe present strucments to the opposite end of the spring,wl1eretureconstitute the secondary pressure-transbys'aid pressLire-transmittingmember will act mitting member, and the follower S preferdirectly onsaid friction elements under ably normally rests against shoulders inthe strains in one direction and on said secondary head at 14:, wherebythe proper relative posi- 3o pressnre-transmitting member and through ittions of the parts is maintained, and in the on said friction elementsunder strains in the preferred construction also aslight movementopposite direction. is allowed said secondary pressure-transmit- Theinvention further consists in certain ting member, as by having a smallspace 15 8o novel details of construction and combinabetween its end andthe follower-plate atthe 3 5 tions and arrangements of parts, all aswill be rear end of the spring.

now described, and pointed out particularly The spring is preferablyinserted under a in the appended claims. slight normal compression, andin operation The accompanying drawing is a section under buffing strainsthe forward followerthrough a rigging embodying the present inplate ispushed inwardly against the wedge- 40 vention. blocks, causing them totravel down the in- The structure is designed for application clines ofthe secondary pressure-transmitting to the underframing of a car, thedimensions member and, acting upon the inclines of the preferably beingsuch as to adapt it to the orfollower, advance the same in the directionof 0 clinary car-framin g and as a substitute for the draw-barmovement,thereby compressing the 4 5 ordinary draft-rigging. spring.Under draft strains the rear follower- In the illustration thecar-framing is shown plate is advanced, and with it the secondarydiagrammaticallyasindicatedby thenumeral pressore-transmitting member,which latter,

acting through the wedge-blocks and inclines, causes the follower at theforward end of the spring to move rearwardly, thereby compressing thespring. v

Under strains in both directions it will be noted that the range ofspring compression is greater than the range of draw-bar movement, dueto the fact that the draw-bar movement is supplemented by the movementdue to the wedging action of the friction element-s. Thus there is nolost motion in setting the friction elements into active relation. Inthe preferred construction, however, the secondary pressure-transmittingmember is made slightly short to insure the setting of the spring underthe desired initial compression and to allow for a slight springcompression before the friction elements are caused to act.

Obviously the relative arrangement of the follower and secondarypressure-transmitting members may be reversed, said secondarypressure-transmitting member being shown as a casing-for the partssimply asa good mechanical construction well adapted for practicalpurposes, because easily constructed, of suflicient strength, andaffording protection against dirt or injury through contact withexternal objects.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is.

1. In an apparatus designed to take up draft and buffing strains appliedto opposite ends thereof through the medium of a pressure-transmittingmember, the combination of a yielding pressure resisting member, afollower at one end of said yielding member and having inclinedfriction-faces, a longitudinallymovable secondary pressure-transmittingmemberhavinginclined friction-faces with connectionsbetween said secondary pressure-transmitting member andpressure-transmitting member whereby the former is moved longitudinallyunder strains in one direction, a stop for arresting its movementunderstrains in the opposite direction, a follower-plate andwedge-blocks located in the chambers between the inclined friction-facesand the followerplate; substantially as described.

2. In an apparatus of the class described, the combination of asecondary pressuretransmitting member having inclined frictibn-faces andmovable in one direction with means for holding it against movement inthe opposite direction, a follower having inclined friction-faces andmovable in a direction opposite to the direction of movement of thesecondary pressure-transmitting member, a yielding pressu re-resistingmember cooperating with the follower, wedge-blocks located between saidinclined friction-faceson" the follower and secondarypressure-transmittin g member, a follower-plate cooperating with saidwedge-blocks and means for holding the follower-plate against movementaway from the follower, whereby under strains applied to thefollower-plate in one direction or to the secondarypressure-transmitting member in the opposite direction, the wedge-blockswill be moved transversely and the follower moved in a direction tocompress the yielding member; substantially as described.

3. In an apparatus of the character specitied, the combination of thefollowing instrumentalities, to wit oppositely-located followers movabletoward each other but held against movement away from each other, afollower located adjacent one of said followerplates and having inclinedfriction-faces, a spring confined between said follower and the oppositefollower-plate, a secondary pressuretransmitting member located betweensaid plates and having inclined friction faces, wedge-blocks locatedbetween the followerplate and friction-faces on the follower andsecondary pressure-transmitting member, respectively, and means wherebythe opposite follower-plate and secondary pressure-transmitting membermay be advanced in unison and the spring compressed from opposite ends,and whereby the advance of the follower-plate adjacent the follower,will compress the spring from one end; substantially as described.

4. In a draft-rigging the combination of fol lower-plates movable"toward each other,asecondary pressure-transmitting member locatedbetween and engaging one of the same and having inclined friction-facesadjacent the other of said plates, a follower located adjacent thelatter plate and having inclined friction-faces thereon, wedge-blockslocated in the chamber between said plate and inclined faces wherebyupon inward movement of either of said plates the follower will be movedin one direction, and a spring confined between said follower and theopposite followerplate; substantially as described.

5. In a draft and buffing rigging, the combination with followenplatesmovable toward each other, stops for limiting their outward movement,and a follower located adjacent one of said plates, and having inclinedfriction-faces, of a spring confined between said follower and theopposite plate, a secondary pressure-transmitting member surroundingsaid spring and having inclined friction-faces at one end and adapted toengage the plate at the opposite end, and wedge-blocks located in thechambers formed by the inclined faces on the follower and secondarytransmitting member and the follower-plate at that end of the device,whereby inward movement of either plate will move the follower in adirection to compress the spring; substantially as described.

6. In a draft and buffing rigging, the com bination with oppositelylocated followerplates, and a secondary pressure-transmitting member inthe form of a casing interposed between and adapted to be moved by oneof chambers and a spring confined between the follower and plate at theopposite end of the device; substantially as described.

said plates and having at one end internal inclined friction-faces, of afollower mounted to move in said secondary pressure-transmitfaoes, saidfaces, the faces on the said membet and the plate at that end formingangular chambers, wedge-blocks located in said Witnesses:

A. P. DENNIS, A. \V. TAYLOR.

ting member and having inclined frict-ion- I RICHARD D. GALLAGHER, JR.

